Series exploring topical scientific issues and their effects for the future
- Programmes:
- on BBC iPlayer (2)
- coming up (1)

Series exploring topical scientific issues and their effects for the future
Watch now (60 minutes)
Available since Tuesday with 1 month left.
The search for answers to one of science's greatest mysteries: how do we know who we are?
Watch now (60 minutes)
Available since Tue, 17 Nov 2009 with 1 month left.
Addiction expert John Marsden explores our relationship with alcohol.
Have a look at the old Horizon web pages to watch clips and interviews from previous programmes
Find related BBC Two programmes.